Initial version.

TINK/TINK.Android/Model/Device/SpecialFolder.cs

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+using Serilog;
+using System;
+using TINK.Model.Device;
+using Xamarin.Forms;
+
+[assembly: Dependency(typeof(TINK.Droid.Model.Device.SpecialFolder))]
+namespace TINK.Droid.Model.Device
+{
+    public class SpecialFolder : ISpecialFolder
+    {
+        /// <summary> Get the folder name of external folder to write to. </summary>
+        /// <returns> Name of the external folder. </returns>
+        public string GetExternalFilesDir()
+        {
+            string baseFolderPath = string.Empty;
+            try
+            {
+                var context = Android.App.Application.Context;
+                Java.IO.File[] dirs = context.GetExternalFilesDirs(null);
+
+                foreach (Java.IO.File folder in dirs)
+                {
+                    bool IsRemovable = Android.OS.Environment.InvokeIsExternalStorageRemovable(folder);
+                    bool IsEmulated = Android.OS.Environment.InvokeIsExternalStorageEmulated(folder);
+
+                    if (IsRemovable
+                        && !IsEmulated)
+                    {
+                        baseFolderPath = folder.Path;
+                    }
+                }
+            }
+
+            catch (Exception l_oException)
+            {
+                Log.Error("Getting external files directory failed. {@l_oException}", l_oException);
+            }
+
+            return baseFolderPath;
+        }
+
+        /// <summary> Gets the folder name of the personal data folder dir on internal storage. </summary>
+        /// <returns>Directory name.</returns>
+        public string GetInternalPersonalDir()
+        {
+            return Environment.GetFolderPath(Environment.SpecialFolder.Personal);
+        }
+    }
+}